As someone who was only young when the original Broadway production played Broadway, I have never seen a production, and don't know much about the show other than the basic plot, this show interests me. The script is in a stack of those to read in the future.
So many people say this show was a bookmark, or a monumentous show for them growing up, or experiencing. Therefore, I feel like those of us who don't have a personal connection, or a well knowledge of the show can't really comment on the possible "miscasting" of some of the roles. For example, I would never put Alison Fraser, Faith Prince, Barbra Walsh, Randy Graff, and Stephanie J. Block in a category to play the "same' role. I'm willing to see how this works out.